Utilizing the exhaust of engines



mama.)

' D. RENSHAW.-

UTILIZING THE EXHAUST OF ENGINES.

No. 274.972. Patented Apr. 3, 1883.

WITNESSES pipe 0.

UNITED STATES PATENT Erica.

DAVID RENSHAW, OF BBAINTREE, MASSACHUSETTS.

. UTILIZING THE EXHAUST OF EINGINES.

SPECIFICATION forming part of Letters Patent No. 274,972, dated April 3, 1883.

Application filed February 23, 1883. (No model.)

To all whom it may concern:

Be it known that I, DAVID RENsHAW, of Braintree, in the county of Norfolk and State of Massachusetts, have invented certain new and useful Improvements in the Processes of Utilizing the Exhaust of Engines; and I do hereby declare thatthc following is afull, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form part of this specification.

My invention relates to means of utilizing the exhaust of engines and returningit to the boiler; and it consists in the process of tak ing water from a boiler under pressure and cooling the same, then forcing it into the exhaust'pipe of an engine at a pressure greater than that ofthe boiler from which it was taken, where it comes in contact with the exhaust, and the whole is returned to the boiler from which it was taken, and is again utilized; and

it consists, further,in the means by which that result is accomplished, all of which will be more fully hereinafter described, and pointed out in theclaims.

In the accompanying drawings,'Figure 1 represents a side elevation of an apparatus embodying my improvements, the tank containing the coil-pipe being in section. Fig. 2 is a rose-head used on the dischargeend of pipe I, which will be more fully hereinafter specified.

A represents the boiler. Bis the engine. (3 is the superheater; D, the pump. E E E E are valves to control the passage of the exhaust. F is an exhaust-pipe from pump D to G is a pipe to supply boiler-water at boiler-pressure to the coilsH in tank J. Said tank is filled with cold water. The Water, in passing through coils H, is cooled. The cooled water is then passed through pipe 11 to the pump, where it is forced through pipe I into the exhaust-pipe G. The pipe I in Fig. 1 is adapted to admit a solid stream of water into the exhaust-pipe G. The rose-head shown in Fig. 2 is adapted to be used on the discharge end of pipe 1, whereby either a solid stream or spray may be injected into the exhaustpipe 0. In either case a partial vacuum is formed by the cooled water coming in contact with the exhaust-steam.

K is the steam-pipe running from the boiler to the engine. K is a. throttle-valve in said pipe. L is a tire-box to superheat the ex haust-steam in the superheater G. d is the exhaust-pipe from the engine to superheater G, and d is a pipe for carrying superheated exhaust steam from heater 0 into the main exhaust-pipe O. M is a steam-pipe leading from the boiler to the pump, and N is a throttle-valve in said pipe.

The exhaust-steam, in returning to the boiler, may be superheated or not without materially departing from the spirit of my invention.

Having thus described myinvention, I claim as new and desire to secure by Letters Patent- 1. The herein-described process for utilizing exhaust, consisting in taking water from a boiler, then in cooling the same, then forcing it into the exhaust-pipe of an engine ata greator pressure than that of the boiler, where itis brought into contact with the exhaust of the engine, (superheated or not,) forming a par tial vacuum and an induced current and pressure, whereby said exhaust and water are returned to the boiler from which theycame, substantially as set forth.

2. The com bination ofthe boiler, superheater G, tank, and coil, the pump and intermediate connections, and exhaust pipe O, substantially as described, and for the purpose'set forth.

3. An apparatus for returning the exhaust of engines to the source of supply, consisting of the boiler,cooling device, and the superheater connected to the exhaust-pipe, in combination with the steam and water returning mechanism, as set forth.

4. In an apparatus for returning the exhaust of engines to the boiler from which it was taken, the combination of the boiler A, pipe G, coils H, tank J, pipe H, pump D, pipes I F M, superheater O, pipe cl, exhaustpipes C d, furnace L, engine B, and steam- ,pipe K, substantially as described, and for the purposes set forth.

In testimony that I claim the foregoing as my own invention I affix my signature in pres ence of two witnesses.

DAVID RENSElAW.

. Witnesses:

B. F. MORSELL, EUGENE D. OARUsI. 

